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Anti-pollution calcium carbonate-based cellulose composite membrane as well as preparation method and application thereof

A cellulose-based and composite membrane technology, which is applied in the field of material chemistry, can solve the problems that the surface of the membrane is easily adhered by oil, limits the application of membrane separation technology, and reduces performance and life. Effect of Pollution Performance

Active Publication Date: 2020-12-04
XIHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this type of material is that the surface of the membrane is often easily adhered by oil during the separation process, causing the pores to be blocked, which reduces the efficiency of oil-water separation.
Especially crude oil with high viscosity and complex components has strong adhesion to most membrane materials, resulting in a sharp decline in the performance and life of the membrane, which seriously limits the application of membrane separation technology in the field of oil-water separation.

Method used

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  • Anti-pollution calcium carbonate-based cellulose composite membrane as well as preparation method and application thereof
  • Anti-pollution calcium carbonate-based cellulose composite membrane as well as preparation method and application thereof
  • Anti-pollution calcium carbonate-based cellulose composite membrane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] S1. Preparation of GO / CMC / CaCl 2 mixture

[0039] The preparation concentration is 0.1mol / L calcium chloride CaCl 2aqueous solution and 0.1 wt% sodium carboxymethylcellulose (CMC) aqueous solution. Add 0.5mL graphene oxide dispersion to 50mL CMC aqueous solution (dilute 1mL GO to 10mL, then take 0.5mL, the concentration of GO dispersion is 0.05mg / mL at this time), under vigorous stirring, dissolve 50mL CaCl 2 The solution was added to the above-mentioned CMC solution containing GO (reacted for about 10min), and GO / CMC / CaCl was prepared. 2 Mixture.

[0040] S2. Preparation of GO-CMC-CaCO 3 Composite film

[0041] Prepare 5 mL of Na with a concentration of 0.1 mol / L 2 CO 3 solution, take 5mL GO / CMC / CaCl 2 The mixture was diluted to 10mL, and the above Na 2 CO 3 The solution was added to the diluted GO / CMC / CaCl 2 In the mixed liquid, stir and react for 20s, then use the mixed acid fiber membrane (pore size: 0.22 μm) as the base, and filter the above suspension t...

Embodiment 2

[0043] S1. Preparation of GO / CMC / CaCl 2 mixture

[0044] The preparation concentration is 0.08mol / L calcium chloride CaCl 2 aqueous solution and 0.08 wt% sodium carboxymethylcellulose (CMC) aqueous solution. Add 0.4mL graphene oxide dispersion to 45mL CMC aqueous solution (dilute 1mL GO to 10mL, then take 0.4mL, at this time the concentration of GO dispersion is 0.05mg / mL), 45mL CaCl 2 The solution was added to the above-mentioned CMC solution containing GO (reacted for about 10min), and GO / CMC / CaCl was prepared 2 Mixture.

[0045] S2. Preparation of GO-CMC-CaCO 3 Composite film

[0046] Prepare 4 mL of Na with a concentration of 0.09 mol / L 2 CO 3 solution, take 4mL GO / CMC / CaCl 2 The mixture was diluted to 10mL, and the above Na 2 CO 3 The solution was added to the diluted GO / CMC / CaCl 2 In the mixed liquid, stir and react for 20s, then use the mixed acid fiber membrane (pore size: 0.22 μm) as the base, and filter the above suspension to prepare a composite membrane....

Embodiment 3

[0048] S1. Preparation of GO / CMC / CaCl 2 mixture

[0049] The preparation concentration is 0.12mol / L calcium chloride CaCl 2 aqueous solution and 0.12 wt% sodium carboxymethylcellulose (CMC) aqueous solution. Add 0.6mL graphene oxide dispersion to 55mL CMC aqueous solution (dilute 1mL GO to 10mL, then take 0.6mL, at this time the concentration of GO dispersion is 0.05mg / mL), under vigorous stirring, dissolve 55mL CaCl 2 The solution was added to the above-mentioned CMC solution containing GO (reacted for about 10min), and GO / CMC / CaCl was prepared. 2 Mixture.

[0050] S2. Preparation of GO-CMC-CaCO 3 Composite film

[0051] Prepare 5 mL of Na with a concentration of 0.11 mol / L 2 CO 3 solution, take 6mL GO / CMC / CaCl 2 The mixture was diluted to 10mL, and the above Na 2 CO 3 The solution was added to the diluted GO / CMC / CaCl 2 In the mixed liquid, stir and react for 20s, then use the mixed acid fiber membrane (pore size: 0.22 μm) as the base, and filter the above suspensi...

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Abstract

The invention provides a preparation method of an anti-pollution calcium carbonate-based cellulose composite membrane, which comprises the following steps: S1, preparing a GO / CMC / CaCl2 mixed solution,respectively preparing a CaCl2 solution, a CMC solution and a GO dispersion solution, and mixing the CaCl2 solution, the CMC solution and the GO dispersion solution to obtain a GO / CMC / CaCl2 mixed solution; and S2, preparing a Na2CO3 solution, mixing the Na2CO3 solution with the GO / CMC / CaCl2 mixed solution obtained in the step S1, performing stirring to obtain a suspension, and performing suctionfiltration on the suspension onto a fiber membrane to obtain the GO-CMC-CaCO3 composite membrane. The anti-pollution calcium carbonate-based cellulose composite membrane provided by the invention hasthe advantage that the water flux, the anti-pollution property, the self-cleaning property and the like of the oil-water separation membrane are obviously improved.

Description

technical field [0001] The invention belongs to the technical field of material chemistry, and in particular relates to an anti-pollution calcium carbonate-based cellulose composite film and its preparation method and application. Background technique [0002] In recent years, membrane separation technology has achieved rapid development in the field of oil-water separation, especially in the field of oilfield sewage treatment. In order to meet oilfield sewage recharge or discharge standards, membrane methods have been widely used in oilfield sewage treatment. However, traditional oil-water separation materials are mostly lipophilic / hydrophobic materials, such as carbon materials, hydrophobic aerogels, polytetrafluoroethylene (PTFE), polydimethylsiloxane (PDMS), etc., and their oil-water separation is based on Mechanism of "Oil Removal" by Selective Oil Absorption in Water Columns. The disadvantage of this type of material is that the surface of the membrane is often easily...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D67/00B01D71/10B01D17/02
CPCB01D17/02B01D67/0079B01D69/12B01D71/10B01D2325/30B01D2325/36
Inventor 马兰范毅吴静张李云颜昀
Owner XIHUA UNIV
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